Suggesting content items to be accessed by a user

A method performed by a computing system comprising one or more processors, storage media, and one or more programs stored in the storage media and executed by the one or more processors to perform the method, the method comprising:

• receiving a call from an electronic messaging application at an application programming interface of an online content management system;
• wherein the call specifies content item search criteria;
• based at least in part on the receiving the call from the electronic message application, performing a lookup in a content item index based at least in part on the content item search criteria specified in the call;
• wherein the content item index indexes a set of content items based at least in part on metadata about the set of content items;
• wherein the set of content items indexed in the content item index are under management of the online content management system;
• wherein the content item index facilitates looking up content items in the set of content items indexed in the content item index based at least in part on the metadata by which the set of content items are indexed in the content item index;
• based at least in part on the performing the lookup, identifying one or more content items, of the set of content items, that satisfy the content item search criteria;
• and
• based at least in part on the identifying the one or more content items that satisfy the content item search criteria, providing a suggestion for at least one content item, of the one or more content items that satisfy the content item search criteria, to attach to an electronic message currently being composed, the electronic message currently being composed using the electronic messaging application;
• and
• wherein the content item search criteria is based at least in part on content of the electronic message currently being composed.

One or more non-transitory computer-readable media storing one or more programs for execution by a computing system comprising one or more processors and storage media, the one or more programs comprising instructions configured for:

• detecting user entry of a sequence of text characters into a text message currently being composed, the text message being composed using a text messaging application;
• based at least in part on the detecting the user entry of the sequence of text characters, sending a call to an application programming interface of an online content management system, the call specifying content item search criteria;
• performing a lookup in a content item index based at least in part on the content item search criteria specified in the call;
• wherein the content item index indexes a set of content items based at least in part on metadata about the set of content items;
• wherein the set of content items indexed in the content item index are under management of the online content management system;
• wherein the content item index facilitates looking up the set of content items indexed in the content item index based at least in part on the metadata by which the set of content items are indexed in the content item index;
• based at least in part on the performing the lookup, identifying one or more content items, of the set of content items, that satisfy the content item search criteria;
• and
• based at least in part on the identifying the one or more content items that satisfy the content item search criteria, providing a suggestion for at least one content item, of the one or more content items that satisfy the content item search criteria, to include in the text message being composed.